<?php
/**
 * Zend Framework
 *
 * LICENSE
 *
 * This source file is subject to the new BSD license that is bundled
 * with this package in the file LICENSE.txt.
 * It is also available through the world-wide-web at this URL:
 * http://framework.zend.com/license/new-bsd
 * If you did not receive a copy of the license and are unable to
 * obtain it through the world-wide-web, please send an email
 * to license@zend.com so we can send you a copy immediately.
 *
 * @category   Zend
 * @package    Zend_Feed_Writer
 * @copyright  Copyright (c) 2005-2011 Zend Technologies USA Inc. (http://www.zend.com)
 * @license    http://framework.zend.com/license/new-bsd     New BSD License
 * @version    $Id: Entry.php 23775 2011-03-01 17:25:24Z ralph $
 */

/**
 * @see Zend_Feed_Writer_Extension_RendererAbstract
 */
require_once 'Zend/Feed/Writer/Extension/RendererAbstract.php';

/**
 * @category   Zend
 * @package    Zend_Feed_Writer
 * @copyright  Copyright (c) 2005-2011 Zend Technologies USA Inc. (http://www.zend.com)
 * @license    http://framework.zend.com/license/new-bsd     New BSD License
 */
class Zend_Feed_Writer_Extension_WellFormedWeb_Renderer_Entry extends Zend_Feed_Writer_Extension_RendererAbstract {
	
	/**
	 * Set to TRUE if a rendering method actually renders something. This
	 * is used to prevent premature appending of a XML namespace declaration
	 * until an element which requires it is actually appended.
	 *
	 * @var bool
	 */
	protected $_called = false;
	
	/**
	 * Render entry
	 *
	 * @return void
	 */
	public function render() {
		if (strtolower ( $this->getType () ) == 'atom') {
			return; // RSS 2.0 only
		}
		$this->_setCommentFeedLinks ( $this->_dom, $this->_base );
		if ($this->_called) {
			$this->_appendNamespaces ();
		}
	}
	
	/**
	 * Append entry namespaces
	 *
	 * @return void
	 */
	protected function _appendNamespaces() {
		$this->getRootElement ()->setAttribute ( 'xmlns:wfw', 'http://wellformedweb.org/CommentAPI/' );
	}
	
	/**
	 * Set entry comment feed links
	 *
	 * @param  DOMDocument $dom
	 * @param  DOMElement $root
	 * @return void
	 */
	protected function _setCommentFeedLinks(DOMDocument $dom, DOMElement $root) {
		$links = $this->getDataContainer ()->getCommentFeedLinks ();
		if (! $links || empty ( $links )) {
			return;
		}
		foreach ( $links as $link ) {
			if ($link ['type'] == 'rss') {
				$flink = $this->_dom->createElement ( 'wfw:commentRss' );
				$text = $dom->createTextNode ( $link ['uri'] );
				$flink->appendChild ( $text );
				$root->appendChild ( $flink );
			}
		}
		$this->_called = true;
	}
}
